Solar Flare WatchHome › Flare history › 1991
M6.1 solar flare on 1991-01-21
ClassM6.1NOAA report
Peak00:331991-01-21 UTC
Duration68 min
Peak flux6.1e-05W/m²
| Comparison | Value |
|---|---|
| Rank in year | 90 / 3297 |
| Other M/X flares that day | 1 |
| M/X flares that month | 36 |
| Solar cycle | Cycle 22 |
| Position on disk | S12W47 |
| Active region | AR 6455 (21 flares) |
Compared with the strongest flares of 1991
X12.0
X12.0
X12.0
X12.0
X12.0
X10.0
X10.0
X9.4
X7.1
X6.1
X5.5
X5.3
Other M/X flares that day
| Date | Begin | Peak | Min | Class | Location | Region |
|---|---|---|---|---|---|---|
| 06:32 | 06:43 | 90 | M2.7 | – | – |
All times UTC. Until June 2017 classes are NOAA's reports of the time (GOES-15 and earlier included a 0.7 scaling factor); later classes come from calibrated GOES-16/18 data, so the same flare reads about 1.4× larger. Do not compare the two periods directly.
← M6.9 1991-01-17X10.0 1991-01-25 →
About this page
A M6.1 flare that began 1991-01-21 00:20 UTC; No. 90 of 3,297 C-class-or-larger flares in 1991.